To start with he fouls way too much. His foul rate is significantly higher than Washington, Withers, and Lubin. The only big with a worse foul rate is Claude, and in recent games Brown has played while Claude has not. UNC has been in NINE games decided by one possession. You can't give minutes to guys who are going to give the opposing team free throws when the margin between winning and losing is so close.
Secondly, he has the worst rebounding rate of any big on the roster, including walk-on Holbrook.
Why did UNC recruit him? He was a top 40 big that seemed to be climbing towards 5 star status. After he committed he plummeted down the rankings over the remainder of his high school career. He finished ranked 122 and 3 star on at least one site.
That doesn't mean we should give up on him becoming a good player over time. It just means your initial comment was wrong. He is in fact the worst big on our roster. Had we been able to buy a good portal center, he probably should have redshirted.